diff options
| -rw-r--r-- | net/sched/sch_api.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index dca6c1a576f7..3d8981fde301 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -618,20 +618,24 @@ void qdisc_class_hash_remove(struct Qdisc_class_hash *clhash, } EXPORT_SYMBOL(qdisc_class_hash_remove); -/* Allocate an unique handle from space managed by kernel */ - +/* Allocate an unique handle from space managed by kernel + * Possible range is [8000-FFFF]:0000 (0x8000 values) + */ static u32 qdisc_alloc_handle(struct net_device *dev) { - int i = 0x10000; + int i = 0x8000; static u32 autohandle = TC_H_MAKE(0x80000000U, 0); do { autohandle += TC_H_MAKE(0x10000U, 0); if (autohandle == TC_H_MAKE(TC_H_ROOT, 0)) autohandle = TC_H_MAKE(0x80000000U, 0); - } while (qdisc_lookup(dev, autohandle) && --i > 0); + if (!qdisc_lookup(dev, autohandle)) + return autohandle; + cond_resched(); + } while (--i > 0); - return i > 0 ? autohandle : 0; + return 0; } void qdisc_tree_decrease_qlen(struct Qdisc *sch, unsigned int n) |